Cabbubetoe



E. RECTOR.

CARBURETOR.

APPLICATION HLED ocT.16,1916.

2 SHEETS-SHEET 2.

Patented Aug. 8, 1922.

PATENT OFFICE.

ENOCI-I RECTOR, OF NEW' YORK, N. Y., 'ASSIGNOR, BY MESNE ASSIGNMENTS, TOTHE YALE @c TOWNE MANUFACTURNG COMPANY, 0F STAMFORD, CONNECTICUT, A COR-PORATTON OF CONNECTICUT.

CARBURETOR.

Specification of Letters Patent. Patgnted Aug, 8, 1922.

Application filed October 16, i916. Serial No. 125,795.

To @ZZ whom tf/nag] concern.' i

Be it known that l, ENooH RECTOR, a citizen of the United States,residing in the city, county, and State of New York, have inventedcertain new and useful Improvements in Carburetors, of which thefollowing is a specification.

My 'invention relates in general to a carburetor of fuel charge formingdevice for internal combustion engines and particularly relates to avaporizing carburetor designed for use with a hydro-carbon fuel whichwill not vaporize with air under ordinary temperatures.

One of the objects of the invention is to provide a simple form ofcarburetor of the class described which will act on a ycheap form ofhydro-carbon and attenuate the same so that it can combine with vair inproper quantities to give the requisite rich-l ness of mixture and atthe proper temperature to effect the most economical actua tion of theengine supplied thereby.

Another obj ect of the invention is topro vide a compensating carburetorresponsive to variation in speed conditions of the engine for regulatingboth the amount of fuel supplied to the engine and for regulating theamount of heat conveyed to the fuel so that different speed conditionsof the engine will drawthe requisite amount of fuel and at thetemperature Abest suited for-any particular speed.

Broadly, I attain this latter object by connecting a pump to some one ofthe moving engine parts and using the pump to force the fuel under thesame pressure conditions to the vaporizing part of the carburetor and tothe burner which heats the vaporizer.

By this arrangement as more -fuel is passed through the vaporizerproportionately more fuel is supplied lto feed the burner and theincreased activity of the burner acts on the increased supply of enginefuel to maintain the previous temperature or otherwise vary thetemperature to suit the conditions imposed by the extra fuel supply.

Another object of the invention is to provide a simple form of pilotlight for the burner which will come into operation automaticallyfwhenthe engine is shut-off and which will become inactive automatically byincrease in pressure in the feed line as when the activity feeds fuel tothe burner.

incidental to these general desiderata it is further contemplated toprovide a device of the class described which will be promptlyresponsive tothe variable demands from the engine; which 'can 1 be'readily assembled and demounted and which can be controlled manually orautomatically.

Various other objects and advantages of the invention 'will be in partobvious from inspection of the accompanying drawings and in part will bemore' fully set forth in the following particular description of oneform of mechanism embodying my invention, and the invention alsoconsists in certain new and novel features of construction andcombination of parts hereinafter set forth and claimed.

n Referring to the accompanying drawings:-

Figure l is a side view partly in vertical section of la preferredembodiment of my invention shown in position connected to an engine;andy y Figures 2, 3 and 4- are horizontal sectional views takenrespectively on the lines E9s- 2,

3 3 and 4-t of Fig. l.

ln' the drawings the attachment to the engine particularly forming thesubjectmatter ofthis application and hereinafter referred to as acarburetor is shown connected to supply fuel to the intake port 5.

of a manifold 6 forming part of an internal combustion engine of anyknown design and which engineincludes a movable element such as theshaft 7 having a speed of rotation dependent upon the speed of theengine. This shaft has a gear wheel 8 fixed thereto and arranged toactuate a pump 9, hereinafter described. This pump is designed to forcefuel from a source of supply, indicated diagrammatically by the gravityflow pipe '10, to the carburetor at a rate responsive to any variationin speed of the engine, so that when the engine is ruiming fastproportionately more fuel is passed by the pump per unit of time thanwhen running relatively slow.

The carburetor inclu-des an organization of a vaporizing deviceincluding a burner for heating the same, and a system of valved piping,including the pump 9, for supplying fuel to both the burner andvaporizing device.

The vaporizing device is designed to constitute an article ofmanufacture arranged to be demountably fastened to the intake manifoldas by means of the bolted flanged connection 11 shown in Figure 2.

The vaporizing device includes an inner heater shell 12, the lowerportion of which is cylindrical and opened at the bottom. The upperportion of the shell is reduced in diameter to form an outlet throat 13for the products of combustion from a burner 11i enclosed within thelower portion of the shell. The throat opens into a chimney 15 having atelescoping fit about the reduced upper end of the shell.

y rlhe lower cylindrical portion of the shell 12 is enclosed by an outercylindrical shell 16, opened at top and bottom and spaced from the innershell to form an annular air passageway 17. This passageway is long` andnarrow so that the heat radiating surface of the inner shell isrelatively large compared to the volume of air in the passageway thusinsuring the preheating of the air even when passing through thevaporizer at high velocity. The lower ends of the shells are maintainedin fixed position by means of a four-arm spider 18 (see Fig. a)demountably fastened thereto by screws 19. rIhe central portion of thespider is in the form of an open top flat cylindrical cup 20, arrangedto receive any fuel spilled from the burner and arranged to constitute awell for receiving a charge of fuel when it is desired to quickly heatthe burner. The burner 14 is fastened centrally to the bottom of the cupand projects upwardly into the cylindrical port of the shell A12 forabout one-third of its height.

rllhe upper end of the vaporizing device is defined by a flat hood 21,the upper wall 22 of which is provided with an opening 23 for containingthe upper end of the shell 12 and which wall is fastened to flange 24projecting laterally from said upper end.

The hood includes a depending cylindrical wall 25 telescoping the upperend of the outer shell 16 and fastened thereto by means of the screws26. This wall 25 is spaced from the reduced upper end of the. innershell to form an enlarged expansion chamber 27 opening from the upperend of the passageway 17 and opening into a fuel passageway 28. rhispassageway extends laterally from the upper end of the vaporizing deviceand is-reduced horizontally to the flanged end 29 (see Fig. 2) and opensdirectly into the intake port 5.

A throttle valve 30 is mounted in the passageway 28 adjacent the end 29for controlling the movement of the fuel mixture into the engine and ismounted on a valve stem 31 which extends exteriorly of the vaporizingdevice.

Four fuel ejecting nozzles 32 are positioned in the: passageway 17slightly above the center thereof and equally spaced circumferentiallyas shown in Figure 3. These nozzles have relatively small vents 3B inthe side thereof, which vents face upwardly so as to direct the fuelfrom the nozzles along the air passageway and into the expansion chamber27. These nozzles are let into the side of the inner shell andconstitute a means for supporting a heating grid 3a mounted within theinner shell above the burner. This grid is spaced from the burner so asto give the most perfect heating condition when the engine is runningatits most efficient speed. This grid is a casting having a. centrallydisposed upright column 85 provided with a bore 36, the lower end ofwhich opens into the bores 37 of four radially disposed arms 38extending outwardly from the column to the wall of the inner she-ll. Thenozzles are threaded into the outer ends of the arms 38 whicharrangement not only provides a simple means for demouutably supportingthe grid but also provide a means for demounting the nozzles to clean orreplace the same. rlhe arms are provided with spaced flanges 39 forincreasing the surface exposed to the heat of the burner. A; heatingcoil 4:0 is positioned in the upper part of the shell 12 and is disposedabove the arms 3S and wrapped to lill the space between the column 35and the wall of the shell. The discharge end of the coil is formed intoa loop 41 projecting upward into the throat 13 and curved down into thetop ends of the bore 36 as' shown in Figure 1. rThe coil and boresleading therefrom collectively have relatively small volume so thatthere is but small clearance for the fuel to be vaporized and acorresponding rapid generation of lightly heated fuel when the action ofthe device is inaugurated.

The piping system f r supplying fuel to the coil and burner includes arotary type of pump 9 driven from the engine shaft 7 through multiplyinggearing formed of the gear wheels 8 and Z12, the latter fined to thepump shaft 113. The` intake end of the pump is supplied with fuel fromthe pipe 10 and the discharge end r-/lof the pumpl is connected to amain pipe line 4to. rlhis pipe; line includes two branches, one branch46 leading to the burner 14e and the other branch 1-7 leading to thelower end of the heating coil 10.

The branches are so proportioned that when the engine is running at thespeed which gives its maximum efficiency, the vaporizing device issupplied with an amount of fuel per unit of time requisite llO to effectthis maximum efficiency and the burner is supplied with an amount offuel just .sufficient to properly vaporize this theoretically `perfectamount of fuel passing through the vaporizing device. When the engineisworking at any other speed it is hardly possible with vents having iXeddischarges is at least approximated and*` obviously the ratiomay be`changed4k by substituting larger or smaller nozzles. n

A single control valve l18 is positioned in the main line to control theflow through both of the branches. rlhe stem i9 of this valve isconnected to the throttle valve stem' 31 by means of a coupling 50 sothat both the valves land SO may be controlled simultaneously. A lever51 is attached to the stem e9 and is arranged so that it may be actuatedmanually when such a control is desired or it may be connectedv totheengine governor when it is desired to control the fuel supply by thespeed of the engine or, in fact, the lever may be connected with anyknown form of automatic control mechanism, i f

The device illustrated includes means for feeding a? relatively smallamount of fuel t0 the'lburner forthe purpose of maintain-y ing a pilotlight whenthe burner is notl otherwise'in active operation. These meansinclude a by-pass pipe 52 of small bore leading` from the pipe 10 to thebranch 46 adjacent its connection withv the burner. The ley-passincludes a check valve 58 normally closed and opening in the directionof flow through the by-pass. A main fuel control valve 54 is positionedinthe pipe 10 for the purpose of regulating the supply from thereservoir (not shown) to the device illustrated.

`The branch 16 is provided with a check valve 55 normally closing offthe main fuel supply to the burner and opened by arise in pressure inthey piping system through the actuation of the pump or other pressurecreating means.

1n operation and assuming thaty there is a pressure of fuel in thereservoir or where the gravity feed system is usedthat the elevation ofthe tank is sufficient tomaintain a pilot light, the valve 5ft is openedand the pilot light at the burner lit through the space between thespider 18 at the bottom` of the vaporizing device. The pressure in thepipe 10 is sufl'cient to open the relatively light check valve 53 and`thus permit the fuel to flow through the by-pass pipe to sup-p ply apilot light in the burner.. The pilot light not only forms an igniterfor the burner but serves to maintain the Vaporizing device hot and thusinsures a prompt vaporizing ofthe engine fuel when Lthe engine isstarted.

r he engine is started, the lever 51 set to open the valves 30 and 18 asis usual in starting engines oflthe type disclosed and the pump beginsto force the fuel from the pipe 10 throughv the main pipe line, as shownby the arrows in Fig. 1. The pressure created by the pump acts on thecheck `valve 55 vto open the same and as long as the pressure ismaintained fuel will flow pass this checlr valve to the burner. Thepilot light will ignite the fuel thus forced to 'the burner andthe heatfrom the burner quickly heats, the arms 38 even to incandescence and theheat is carried on to the column 35 and the coil l() rapidly heating thesame. The products of combustion from the burner are finally passed outthrough the chimney 15. At the same time the fuel is forced up throughythe other branch L7 and heating coil, down through the loop 41, bore 46and outwardly through the vents 33 in the nozzles. During its passagethrough the vaporizing device the fuel is heated to high temperature andwhen ejected into the passageway 17 isvaporized so as to be highlyattenuated.

`Air isy drawn into the lower end of the passageway 17 and is heated bycontact with the shell 12 before it comes in contact with the heatedfuel from the nozzles. The

kspaced apart position of the nozzles insures an intimate mixing of airand gaseous fuel rbefore the mixture is passed into the eX- pansionchamber. The expansion chamber will be suppliedwith this fuel mixture aslong as the vaporizing device is opened to the suction of the engine.y

The high pressure created by the pump on the fuel in the branch 46'reacts through the bypass pipe to overbalance the normal pressureacting to open the check-valve 53 and permits or forces the check valveclosed thus intercepting any How from the pump back into the supply pipe10.

Should the speed of the engine increase or 'decrease from its normalworking speed, the pump will respond accordingly and force aproportionately greater or lessk amount of fuel to the vaporizing deviceand burner thus affecting not'only an automatic regulation of the fuelsupply passed' to the engine but also 1 an` automatic regulation of theamount of fuel fed to the burner.

By adjusting the position of the lever 51 the amount of fuel permittedto pass into the engine is regulated as is usual with devices of thischaracter but in addition to this function the lever 51 also controlsthe burner. llVhen the lever is moved into position to intercept theflow through the main pipe line, the pressure therein is reduced, thevalvek 55 closes automatically and the normal gravity pressure in thepipe 10 opens the valve 58 and reestablishes the pilot light in activeoperation. By using a rotary type of pump the same can run idly underits own momentum after the control valves are shut-off without doing anyparticular harm.

By means of a device of this character there is attained not onlyasaving in fuel but a cheap grade of crude oil may be used as fuel forboth the engine and vaporizer burner.

The clearance in the coil and the disposition of the vents in the smallvolume air passageway insures practically an instantaneous vaporizingand mixing of the crude oil vapors with the air which has been quicklyheated in its passage along the extensive area presented by the innershell.

lla-ving thus described my invention, l claim:

1. ln a device of the class described, an internal combustion engine, apassageway leading to the engine, a carburetor including a nozzle forejecting fuel into said passageway, a conduit for supplying the fuel tosaid nozzle, a supply pipe leading to said conduit, means for heatingsaid conduit to vaporize the fuel before it is ejected and for heatingsaid passageway and means leading from the supply pipe and in advance ofthe heated conduit for diverting some .of the fuel to said heatingmeans, a pump driven from the engine for maintaining a pressure in saidconduit.

2. ln adevice of the class described, a fuel conducting passagewayleading to an engine, means for leading` fuel to said passageway, meansfor heating said leading means, and means controlled by the speed of theengine for supplying relatively cold fuel in continuous solid liquidstreams from a common source to both said leading` means and to saidheating means.

3. ln a device of the class described, the combination with the intaketo an engine, of means for conducting fuel to said intake, saidconducting means including` a vaporizer for supplying` gaseous fuel tothe engine and a self-vaporizing heating means for heating thevaporizer, and means controlled by the speed of the engine forregulating the amount of liquid fuel supplied to said self-vaporiaingheating means whereby the heating means is promptly responsive tovariations in speed of the engine.

4;. ln a device of the class described., the combination with an engineand an element driven thereby, of a fuel supply for the engineincluding` a vaporizer, heating means for said vaporizer and meanscontrolled by said element for regulating the amount of fuel suppliedper unit of time to said heating means per unit of movement of saidelement.

5. in a device of the class described, the

combination with an engine and an element driven thereby, means attacheddirectly to the engine for supplying a heated fuel to said enginewhereby heat losses from the heated fuel are reduced to a minimum, saidmeans including a vaporizer placed relatively close to the intake of theengine and burner for said vaporizer and means controlled by saidelement and acting on said supply means for regulating the amount ofliquid fuel supplied to the burner. v

6. ln a device of the class described, the combination with an internalcombustion engine, of a device for supplying gaseous fuel to saidengine, said device comprising a source of liquid fuel, a vaporizer forthe fuel supplied to the engine, a burner for heating said vaporizer,and mechanism operatively controlled by the speed of the engine formaintaining a supply of liquid fuel to both the vaporizer and itsburner, said mechanism including means for acting on the liquid leadingto said vaporizer and burner to cause the pressure thereon to vary inproportion to variations in speed of the engine.

E. ln a device of the class described, avaporizing device, a burnertherefor, a pipe line having two branches for supplying both the deviceand burner and a pump for foreing liquid fuel through said pipe line.

8. ln a device of the class described, a vaporizing device, a burnertherefor, a pipe line having t .io branches for supplying both thedevice and burner, a pump for forcing liquid fuel through said pipe lineand a single valve disposed in said pipe line between the pump and saidburner for regulating the flow through the pipe line.

9. in a device of the class described, a conduit adapted to containliquid fuel under pressure, two branches opening from said conduit, avaporizing device supplied from one of said branches, burner for heatingsaid .f'aporizing device supplied from the other branch whereby the fuelsupplied to both the vaporizing device and to the heating device areunder the same pressure, means for creating said pressure and meanscontrolled by the pressure in the conduit for regulating the fuelsupplied to said burner.

10. ln a device of the class described, the combination of avaporizingrdevice and a burner therefor, a pipe line for supplying asolid liquid fuel to both the device and burner, a valve in said pipeline, and a single controlling device regulating the fuel discharge toboth the vaporising device and to the burner.

11. ln a device of the class described, the combination of a vaporizingdevice having a discharge nozzle adapted to provide a definite dischargeof gaseous fuel at a given pressure, a burner for heating said device,v

means for supplying liquid fuel to both said vaporizing device and tosaid burner, saidv discharge nozzle being replaceable with a nozzleproviding a different yrate of discharge at said given pressure, therebyto vary the ratio of fuel discharged from said nozzle compared with therate of fuel discharged from said burner.

12. In a device of the class described, the combination of a vaporizingdevice having an outlet `adapted to discharge a definite amount ofgaseous fuel at a given pressure,y

a liquid fuelburning burner for heating said vaporizing device, saidburner having a definite ratio of discharge at awgiven pressure andmeans for varying the Vratio of discharge from the burner to thedischarger from the vaporizing outlet.

. 13. In a device of the class described, the combination of a liquidfuel supply pipe havying two branches leading therefrom, a vavaporizersupplied from one 0f the branches,

a burner for heating the vaporizer supplied from the other branch andpressure creating means for forcing the liquid fuel through said supplypipe to both of said branches, whereby both branches will be filled withliquid fuel and the pressure on the liquid therein will be responsivedirectly to variations thereon caused by said pressure creating means. y

15. In a device of the class described,fthe combination of a liquid fuelsupply pipe having two branches leading therefrom, a vaporizer suppliedfrom one of the branches, a burner for heating thevaporizer suppliedfrom the other branch and a rotary pump operatively connected to saidsupply pipe to force the fuel under lpressure directly through saidbranches to both said vapor-` izer and said burner. v y i 16. In adevice of the classdescribed, the combination withfa vaporizer and aburner for heating the same, of a single supply means for feeding liquidfuel in continuous y from a liquid hydrocarbon, comprising la streams toboth the vaporizer and burner.

17. In a device of the class described, the combination with avaporizer, a burner for heating the same, of a single supply means forfeeding liquid fuel in continuous streams to both the vaporizer andburner, and pressure creating means acting on the liquid in said .supplymeans, v

gine. f f n Y n A device for supplying fuel to an en- 18. In a device ofthe class described,-the combination with'an engine and a power elementdriven thereby, of a vaporizer and a burner for heating the same, asingle supply pipe provided with two branches, each branch being filledwith `liquid fuel under pressure, one leading directly to the burner andthe other leading to the vaporizer and a pump driven yfrom ksaid powerelement and acting on the fuel in said supplypipe to maintain thepressure onthe liquid fuel until it reaches. the vaporizer and burner. n

19. In a device of the class-described, the

`combination with an engine and a power jelement driven thereby, of avaporizer and a burner for heating the same, a conduit leading fromthevaporizer to the engine for supplying the same with heated fuel, asingle supply pipe provided with two branches, each branch being'filledvwith 4liquid fuel under pressure,fone leading` directly to the burnerand the other leading tothe vaporizer and a pump power from said drivenelement and` acting on the fuel in said supply pipe to maintain thepressure on the liquid l -fuel .lint-il it yreaches the -zvaporizer andburner.

y 20. A device for supplying fuel to an engine comprising a flame heatedvaporizer, a burner for heating the same, a system yof pipes forsupplyingboth the vaporizer and burner with liquid fuel, a continuouslyacting pump adapted to be connected tothe and burner under pressurewhich increases promptly with increase in speed of the en- 21. ginecomprising afflame heated vaporizer, a burner for heating the same, asystem of pipes for supplying both the vaporizer and burner with liquidfuel, 'a continuously acting pump adapted to be; connected to the engineso as to be driven thereby, said pump being operatively connectedftosaid pipes to supply liquid fuel directly to the vaporizer and burnerunder pressure which increases vaporizer formed of two parts, means forkleading ,the liquid hydrocarbon to one of lsaid partsfor a preliminaryheating, saidVv first part'discharging the preheated hydrocarbon intothe other part for a final heating, a single burner forheating bothparts, a

supply pipe constituting a source of liquid i'io Lpromptly with increasein speed` of the enhydrocarbon, said pipe provided with tivo branches,one constitntingsaid means leading to the vpreheating part of thevaporizer and the other branch leading directly to the burner.

' 23. A device for forming gaseous fuel from a liquid hydrocarbonincluding vaporizing means for subjecting the liquid hydrocarbon to ativo stage heating, a single burner for heating said means, a conduitfor supplying liquid hydrocarbon to said vaporizing means and meteringmeans for apportionating an amount of the hydrocarbon to the burner toinsure the requisite heating ofthe vaporizing means.

24. In a device of the class described, the combination of an enclosingshell, a burner mounted in said shell, a vaporizer positioned in saidshell and disposed relative to said lburner so as to be heated thereby,a system of pipes positioned exteriorly of the shell so as to besubstantially free of the heating effect of the burner, said system ofpipes including a supply pipe constituting a source of liquid fuelsupply, said pipe having tivo branches, one leading directly to theburner to supply the same With cold liquid fuel and the other leading tosaid vaporizer.

v25. In a device of the class described, the combination of an enclosingshell, a burner mounted in said shell, a vaporizer positioned in saidshell and disposed relative to said burner so as to be heated thereby, asystem of pipespositioned exteriorly of the shell so asto besubstantially free of the heating effect of the burner, said system ofpipes in cluding a supply pipe constituting a source of liquid fuelsupply, said pipe having` tivo branches, one leading directly to theburner to supply the saine with cold liquid fuel and the other leadingto said vaporizer, and a continuously acting pump operatively connectedto said pipe to maintain the branch pipes filled `with liquid fuel underpressure.

"26. In a device for producing highly heated gaseous hydrocarbons,thecombination of a vaporizer comprising a conduit constituting apreheating chamber and a second conrduit opening` from the first chamberand constituting a nal heating' chamber, said conduits collectivelyhaving a relatively small volume thereby providing small clearance forthe hydrocarbon being vaporized, a burner having la relatively largeheating capacity for heating said vaporizer and means for supplyingsolid streams of cold liquid hydrocarbon to both the vaporizer andburner.

27. In the art of forming from a liquid hydrocarbon a continuous streamof gaseous fuel, the process which consists in dividing a v stream ofthe liquid hydrocarbon and heating'the` liquid in one part of thedivided stream `by the combustion ofthe-liquid in the other part of thedivided stream, said parts being apportioned so that the burning streamWill supply, per unit of time, both tl e latent heat necessary tovaperize the other part per unit of time and the active heat necessaryto raise the resulting gas to the desired temperature.

` 2S. ln a device of the class described, the combination of an internalcombustion engine including a movable element, means for supplying fuelto said engine, said means including` a fuel heating device formed of acombined main and a preheating burner, a source of liquid fuel supplyunder pressure, means fur conducting fuel from said source to saidburner and means connected to said movable element and controlled by the.speed of the engine for selectively opening the source 'to either themain burner or to the preheating burner.

` 29., ln adevice of the class described, the combination of an internal.combustion engine including a movable element, means for `supplyingfuel to said engine, said means including` a fuel heating device formedof a combined main and preheating burner, a source of liquid fuel supplyunder pressure, means for conducting fuel from said source to saidburner, a rotary pump operatively connected to said element so as to becontrolled by the speed thereof and acting on the fuel leading to themain burner whereby increase inengine speed of the element Will cause anincrease in the amount of fuel sup-` plied to the main burner andavalvular `means operatively controlled by an overbal ancinp; of the fuelpressure in said source for supplying said preheating burner When theengine stops ruiming.

30. ln a device of the class described, the combination of an internalcombustion engine including a movable element, means for supplying fuelto said engine, said means including a fuel heat-ing device formed of amain heating burner and burner, a source of liquid fuel supply underpressure, means for conducting fuel from said source to said burner, arotary pump operatively connected to said element so as to be controlledby the speed of the engine and acting on the fuel leading` to the mainburner whereby increase in engine speed will cause an increase cluding aburner, a conduit leading to said burner, a main pipe, means forcreating a relatively high pressure in said main pipe,

said pipe provided with two branches, one

leading to the burner and the other leading to the vaporizer, a normallyclosed check valve in the branch leading' to the burner, a by-pass pipeleading to the conduit for supply the burner and a normally closed checkvalve in. said byepass pipe adapted to be open by the overbalancing ofpressure in the by-pass pipe over the pressure in the main pipe.

32. ln a device of the class described the combination of a vaporizerand a heating device for the saine7 said heating device including meanscapable of functioning as a main burner and a pilot burner, a conduitleading to said means, a main pipe, means for creating a relatively highpressure in said main pipe, 'said pipe provided with two branches? bothleading to the main burner and the other leading to the vaporizer, anormally closed check valve in the branch leading to the main burner, aby-pass pipe leading` to the conduit for supplying the pilot burner, anormally closed check valve in said bypass pipe adapted to be open bythe overbalancing of pressure in the by-pass pipe over the pressure inthe main pipe and a rotary pump in said inain pipe adapted to forceliquid fuel under pressure to both the main burner and the vaporizer andto act through the conduit to hold the check valve in the ley-pass pipefirmly in closed position.

Signed at New York city, iii the county of New York, and State of NewYork this thirteenth day of October. A. l). 1916.

' ENCH RECTOR.

